Allen D' Malony, Sameer Shende, Robert Bell

1
APART Partnership Oregon

• Allen D. Malony, Sameer Shende, Robert Bell
• malony,sameer,bertie_at_cs.uoregon.edu
• Department of Computer and Information Science
• University of Oregon

2
Current Research Work and Status

• TAU Performance System (Version 2.10)
• Flexible performance instrumentation
• Measurement library and profile analysis tools
• Integration with parallel performance technology
• Program Database Toolkit (PDT) (Version 2.0)
• C, C, Fortran 77/90 source analysis
• Automatic source instrumentation
• OpenMP performance interface
• Automatic performance testing and reporting
• TAU and PDT application
• SAMRAI, Overture (LLNL) UPS (LANL)
• C-SAFE / Uintah (Utah)

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General Complex System Computation Model

• Node physically distinct shared memory machine
• Message passing node interconnection network
• Context distinct virtual memory space within
  node
• Thread execution threads (user/system) in context

Interconnection Network
Inter-node messagecommunication


Node
Node
Node
node memory
memory
memory
SMP
physicalview
VM space

?
?
?
modelview

Context
Threads
4
TAU Performance System Architecture
5
PDT Architecture and Tools
C/C
Fortran 77/90
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Semantic Performance Mapping

• Associate performance measurements with
  high-level semantic abstractions
• Need mapping support in the performance
  measurement system to assign data correctly

7
TAU Java Instrumentation Architecture
Java program
mpiJava package
TAU package
JNI
MPI profiling interface
Event notification
TAU wrapper
TAU
Native MPI library
JVMPI
Profile DB
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XPARE - eXPeriment Alerting and REporting

• Alan Morris, University of Utah (SC 2001 poster)
• Experiment launcher automates configuration /
  compilation of performance tools and Uintah
  application for each experiment
• Collects performance data after experiment run
  and sends it to reporting system
• Reporting system checks data against predefined
  set of rules for the given experiment
• Alerts users via email if thresholds have
  exceeded
• Webtools allow alerting setup and full
  performance data reporting
• Historical performance data analysis

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Alerting Setup
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Experiment Results Viewing Selection
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Web-Based Experiment Reporting
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Web-Based Experiment Reporting (continued)
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Current APART Interactions

• Research Centre Jülich (B. Mohr and F. Wolf)
• TAU development
• PDT development (DUCTAPE)
• OpenMP performance interface
• University of Vienna (T. Fahringer)
• OPUS / HPF application
• SCALEA integration
• University of Wisconsin, Madison (B. Miller)
• DyninstAPI for pre-execution instrumentation

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Evolution of the TAU Performance System

• Future parallel computing environments need to be
  more adaptive to achieve and sustain high
  performance levels
• TAUs existing strength lies in its robust
  support for performance instrumentation and
  measurement
• TAU will evolve to support new performance
  capabilities
• Online performance data access via
  application-level API
• Whole-system performance monitoring
• Dynamic performance measurement control
• Generalize performance mapping
• Runtime performance analysis and visualization
• Three-year DOE Office of Science contract

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Future APART Interactions

• WP1 Performance XX Specification Techniques
• Property mixed-mode, dataflow, component
• Experiment interface for performance
  observation
• Model empirical characterization, parametric
• WP2 Common Interfaces and Integration
  Techniques
• TAU as common performance measurement system
• TAU integration with EXPERT
• Generate profile statistics for EXPERT analysis
• Generate trace data in EPILOG format
• Performance experiment management
• Performance data management

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Integrated Performance Analysis System
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Performance Database Framework (PerfDBF)

• PerfDML (Performance Data Modeling Language)
• PerfDB (Performance DataBase)

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Performance Experimentation System
PerformanceObservationSystem

• Performance ExperimentSpecification Language
  (PerfESL)

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QUEST Performance Research Group

• Research group to coordinate research projects
• QUEST projects
• TAU performance system
• PDT source analysis tools
• Poirot performance diagnosis heuristic search
• I-Ching automated performance analysis / modeling
• Thoth performance database
• Performance visualization and steering
• Dynamic instrumentation integration
• Performance-engineered component software
• QUEST applications